[Python] How to override returning type hint of inheritance class?

I'm able to overload a type hint of a method in subclass without its implementing. I tried something like this:

from typing import Any, overload


class A:
def __init__(self, param) -> None:
self.param = param

def get(self) -> Any:
return self.param


class B(A):
def __init__(self, param) -> None:
super().__init__(param)

@overload
def get(self) -> str: ... # Changed a returning type hint here


test = B('something')
test.get() # NotImplementedError: You should not call an overloaded function. A series of @overload-decorated functions outside a stub module should always be followed by an implementation that is not @overload-ed.


But it doesn't work.

All I want to do is just specify the types without writing any code for the method itself. What should I do in this case?

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